return auto_vec from more dominance functions

This ensures the vector gets cleaned up by the caller when appropriate.

Signed-off-by: Trevor Saunders <tbsaunde@tbsaunde.org>

gcc/ChangeLog:

	* dominance.c (get_dominated_to_depth): Return auto_vec<basic_block>.
	* dominance.h (get_dominated_to_depth): Likewise.
	(get_all_dominated_blocks): Likewise.
	* cfgcleanup.c (delete_unreachable_blocks): Adjust.
	* gcse.c (hoist_code): Likewise.
	* tree-cfg.c (remove_edge_and_dominated_blocks): Likewise.
	* tree-parloops.c (oacc_entry_exit_ok): Likewise.
	* tree-ssa-dce.c (eliminate_unnecessary_stmts): Likewise.
	* tree-ssa-phiprop.c (pass_phiprop::execute): Likewise.

1 files changed, 5 insertions, 8 deletions

diff --git a/gcc/gcse.c b/gcc/gcse.c
index 9114f30..ecf7e51 100644
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -3050,9 +3050,7 @@ static int
 hoist_code (void)
 {
   basic_block bb, dominated;
-  vec<basic_block> dom_tree_walk;
   unsigned int dom_tree_walk_index;
-  vec<basic_block> domby;
   unsigned int i, j, k;
   struct gcse_expr **index_map;
   struct gcse_expr *expr;
@@ -3106,15 +3104,16 @@ hoist_code (void)
   if (flag_ira_hoist_pressure)
     hoisted_bbs = BITMAP_ALLOC (NULL);
 
-  dom_tree_walk = get_all_dominated_blocks (CDI_DOMINATORS,
-					    ENTRY_BLOCK_PTR_FOR_FN (cfun)->next_bb);
+  auto_vec<basic_block> dom_tree_walk
+  = get_all_dominated_blocks (CDI_DOMINATORS,
+			      ENTRY_BLOCK_PTR_FOR_FN (cfun)->next_bb);
 
   /* Walk over each basic block looking for potentially hoistable
      expressions, nothing gets hoisted from the entry block.  */
   FOR_EACH_VEC_ELT (dom_tree_walk, dom_tree_walk_index, bb)
     {
-      domby = get_dominated_to_depth (CDI_DOMINATORS, bb,
-				      param_max_hoist_depth);
+      auto_vec<basic_block> domby
+	= get_dominated_to_depth (CDI_DOMINATORS, bb, param_max_hoist_depth);
 
       if (domby.length () == 0)
 	continue;
@@ -3315,10 +3314,8 @@ hoist_code (void)
 	      bitmap_clear (from_bbs);
 	    }
 	}
-      domby.release ();
     }
 
-  dom_tree_walk.release ();
   BITMAP_FREE (from_bbs);
   if (flag_ira_hoist_pressure)
     BITMAP_FREE (hoisted_bbs);